Coil erminal



H. C. EGERTUN.

COIL TERMINAL.

AlPLiEATlON mm maze. 1918.,

Patented Dec. 13, 1921.

UNITED STATES PATENTOFFiCEi.

nnnarg noaar np r mssaic, new 1mm, ASSIGNOR TO wias'rnnur GOMPANY, inoo'nronatrnn, on NEW YORK, N. 5., A CORPORATION or can. an

Specification of Letters Patent.

Panama has. in. rear.

Application filed April 2B, 1918. Serial No. 231,023.

exact description.

. This invention relates to coils or windings of the type'which is employed for electricalpurposes. I v

- The principal object of this invention is to provide an improved attaching means or terminal for such coils. y 1

In many cases it is necessary to form coils of a very fine wire. "When such coils have been completed and it is desired to combine them with other electrical apparatus, considerable difliculty may be encountered in connecting the ends of the coil winding with other conductors or binding posts. In making such connections, the ends of the winding oftentimes break thus necessitating the unwinding of a portion of the coil in order to have asufiicient length of conductor for the making of such connections. This can, however, be accomplished it the outer end breaks, but if the inner end breaks; this course cannot be followed since the inner turns of the coil are not readily accessible. The terminal of the present invention is designed to overcome this difliculty. Ditliculty is often experienced in positioning small coils in proper operative position on electri-l cal devices, particularly where it is not possible or desirable tosupport the coil on a core. The terminal of this invention is not only adapted to serve as'a terminal, but may also serve as a means for supporting the coil.

In accordance with a feature of the invention, a coil is provided with an attaching means which is adapted to be secured by the convolutifons' of the 'winding and is so arranged thatit does not appreciably alter the shape orsize of the coil.

In accordance with a related feature of the invention, a coil is provided with a pair of insulated conductors having a loop portion, which portion is embedded in the body associated with the inner or outer end of the.

winding, while the other end as an atta'chin means or terminal for the coil;

In the accompanying drawing, Figure 1 shows a plan view of a coil illustrating one embodiment of the invention;.Fig. :2 is an elevation partly in section of the coi' shown in F 1g. 1; Fig. 3 is a plan view showing modified form of the invention; Fig) 4e is an elevation partly in section of the coil shown in Fig. 3; and Fig. 5 is a perspective. of the coil shown in Fig. 1, showing a method for sufi'porting the same. ferring now to particular embodiments of the invention illustrated therein, 4. represents the coil support which may be of any suitable material. The coil. thereon comprisesva body or tion 5 which is formed of a plurality s of fine WlI'S. The attachino means or terminals, 6 and 7, are formed of a stranded lie. :ible wire of a diameter which is relatively larger than that of the winding forming the body portion of the coil. By forming these conductors of flexible wire, the ends forming the terminals may be moved about more freely'without' in anyway affecting the other ends of the conductors to which the ends of the winding are secured. This feature is especially true where the flexible conductor is composed of a;plurality of strands. These conductors havealoop portion 8 which embedded in the coil during the process oi conductor 7. The other ends 01 these conductors 6 and 7 thereby some as an attaching means or terminals for the coil. Since the conductors 6 and 7 are embedded in the body portion of the coil, any strain that might come upon the terminals w ll not re sult in injury to the ends of the (.Oli which would necessitate the unwinding of a portion of the coil.

In forming the coil after a predetermined number of layers of wire have been wound upon the coil support 4 which is preferably of a strong paper tube, the winding machine is stopped and the loop portion of the ins11- lated conductors 6 and 7 is then positioned on that portion of the coil which has already been wound, in such a manner that when the winding is complete the loop portion. will be securely anchored by the remaining turns Figs. 1 and 2 and the can he used to c Fig. 5, the no of em winding. When the winding is completed e few turns of serving is Wound thereon, after which the coil is impregnated in any suitable msceriol in order to insure good insulerhion and greater rigidiay. After the process has been. completed, the inner and outer ends of "the winding are connected to their respective terminals or ah 'lschin means as'hereinbefore described.

in she. preferred form of the invention as disclosed. Fig.1, it is evident that the conductors forming theterminels of such a coil are adapted to be used as an clinching or supporting means for such a, coil. In 11 of Fig. 1 is shown suspended from s rod or supporting meens'), by the conductors 6 and 7. It will be seen from this figure that where it is impossible to snggportthe coil by means of a core or even by she sides of the coil itself, this method good advsntage,

Figs 3 and 4 illustrate a modified form the invention in which the terminals or hinding posts ll-nre formed of :1

- ginnclmigg of social or other suitable meteriel, one end which convoluiions of she wind thereof projoei-ing idv r sly from the end surfs-cc of -he coil, The portion of the terminals or binding poses 10 and 11 which secured by the coiiv -luhions of &he windere covered by an insulating member 12 to prevent the terminals from coming in electrical contact Willi the iurns of the windingn The ends of the Winding may be WFJ$ l around the respective terminals. @ohnection ney chefs be made directly to he ends of she winding after they have been wrapped around the binding poses or terminals, or directly to she punching.

is secured by ellB in the either ends 1 ,econee What is claimed is:

1. An electrical coil comprising a, winding, and s conductor tion inserted between the convolutions oi the Winding with the ends thereof projecting beyond the surface of the soil structure to provide a terminal for the ends of the Winding and s snpporlz for the coil structure.

2. An elecericsl coil comprising a Winding and an'insulsted conductor having a. loop ortion interposed between adjacent convo utions of said winding with the ends thereof projecting coil structure; one end of said conductor being connected to an end of said winding, the other end of said conductor serving as a terminal for said coil.

3. An electrical coil comprising a winding and a conductor of a diameter relatively larger than that of said Winding having a, loop portion embedded in the body of ihe coil with the ends thereof projecting beyond the surface of the coil structure, one end of said conductor being connected to an end of said Winding, tor serving as a terminal for sold coil.

d. An elec ricel coil comprising a Winding and e flexible conductor having a loop porlion anchored Within and by portion of the Windingwvith the ends thereof rejecting from the surface of the coil structure, one

end of said conductor heing connected to on end of said winding and the other end of said conductor said coil In witness whereof, I hereunto subscribe my name this 23rd day of April A. D, 1918.

HENLY C. EGERTON.

serving as a terminal for having s loo o por-- beyond the surface of the.

fihe other end of said conduc-- 

